Door control mechanism



Jan. 5, 1954 L. J. WAGNER DOOR CONTROL MECHANISM 6 Sheets-Sheet 1 Filed June 9, 1949 MW 1 m w M Jan. 5, 1954 L. J. WAGNER 6 Sheets-Sheet 2 Jan. 5, 1954 L. J. WAGNER 2,665,158

DOOR CONTROL MECHANISM Filed June 9, 1949 O v SSheetS-JSheet 3 INVEN TOR.

47' TOENEKS.

Jan. 5, 1954 L. J. WAGNER 2,665,158

DOOR CONTROL MECHANISM Filed June 9, 1949 6 Sheets-Sheet 4 M nd i INVEN TOR.

14 77 GENE Y6.

Jan. 5, 1954 L. J. WAGNER 2,665,158

DOOR CONTROL MECHANISM Filed June 9, 1949 6 Sheets-Sheet 5 INVENTOR.

Jan. 5, 1954 L. J. WAGNER DOOR CONTROL MECHANISM 6 Sheets-Sheet 6 Filed June 9, 1949 INVENTOR. 150M420 J W46N 4 TTOE/WFKS Patented Jan. 5, 1954 UNITED STATES PATENT OFFICE DOOR CONTROL MECHANISM Application June 9, 1949, Serial No. 98,001

13 Claims. (Cl. 292216) This invention relates to door control apparatus and more particularly to an improved door latching and locking mechanism especially adapted for use with hinged doors. Although my invention is illustrated and described here in as embodied in an automobile body it will be understood that it may readily be adapted for use with doors, closure members, etc. of other structures.

In the copending United States patent application of Angelo R. de Vito, Serial No. 89,540, filed April 25, 1949, there is disclosed and claimed a door control mechanism which includes door latching and door locking means and an outside operating member (such as a handle, push button, or the like) and in which the outside operating member is arranged so that in normal oporation it releases the latch mechanism to permit opening of the door in the usual manner but which may be manipulated in a distinctive manner, when the door is unlatched and open, to sheet locking of the door, upon closing thereof, without use of the key. It is an object of the present invention to provide a particularly effective, rugged, and economically manufactured door control mechanism of the general type disclosed and claimed in said copending Angelo R. de Vito patent application.

Other objects of my invention include: the provision of an improved means for utilizing the outside latch operating member for controlling, under certain conditions, the locking of the door; the provision of an improved lock mechanism which may readily be incorporated in door control devices of the general type described and claimed in the Rudolph I. Schonitzer United States Patent No. 2,09%,413, and more particularly in the type of door control mechanisms de scribed and claimed in the copending United States patent applications of Edwin L. Allen, Serial No. 76,023, filed February 12, 1949, and Serial No. 131,296, filed December 6, 1949, without increasing the bulk or the number of Working parts of the mechanism; and, the provision of an improved automatic locking mechanism which, by a minor change in the shape of one part, which change does not increase the cost of the device, may be modified to provide a door control mechanism in which automatic locking may be effected only by a dual manipulation of both the outside operating member and the in side lock operating means.

The above and other objects of my invention will appear from the iollowing description of several embodiments thereof, reference being had to the accompanying drawings in which:

Figure l is a fragmentary outside side elevational View of an automobile door in which my improved door control mechanism is installed, the door being shown in closed and locked position; a

Figure 2 is a vertical cross-sectional view taken substantially on line 22 of Figure 1;

Figure 3 is a detached view of the door control mechanism of Figure 2, the parts being shown in the same positions as Figure 1 but with the bottom key operated lock portion omitted for purposes of simplification of the View;

Figure 4 is a vertical cross-sectional view taken on line -il of Figures 2 and 3;

Figure 5 is a View similar to Figure 3 but show-- ing the parts in their normal unlatched and unlocked positions;

Figure 6 is a vertical cross-sectional view, similar to Figure 4, taken on line t6 of Figure 5, the action of the detent lock stop portion to prevent movement of the look into preset position when the detent is in latch released position being indicated in phantom lines.

Figure '7 is a vertical crosssectional view generally similar to Figures 3 and 5 but illustrating the detent member in its locking position and the locking member in preset position;

Figure 8 is a vertical cross-sectional View taken on line e-e of Figure 7, the lock member being shown in its preset position and the detent not yet having been released by the operator for return to its latch released position shown in Figures 5 and 6.

Figure 9 is a view generally similar to Figure 7, taken substantially on line 9-9 of Figure 10, but illustrating a modified form of my door control mechanism in which both the outside operating member and the inside look operating means must be manipulated to effect locking of the door from outside without use of the key;

Figure 10 is a vertical cross-sectional view taken substantially on line Hl,lfl of Figure 9:

Figure 11 is a detached vertical cross-sectional view, generally similar to Figure 3, but showing my improved lock mechanism combined with a somewhat different type of latch mechanism, the parts being shown in latched and locked position;

Figure 12 is a vertical cross-sectional view taken substantially on line l2l2 of Figure 11;

Figure 13 is a vertical cross-sectional view generally similar to Figure 11 and illustrating the same mechanism, the parts, however, being shown in unlatched and unlocked positions, the permissible overrun of the detent beyond latch releasing position without moving the look into preset position being indicated in phantom lines;

Figure 14 is a vertical cross-sectional view taken substantially on line l4l4 of Figure 13, the lock member being shown in unlocked position with a phantom line indication of how it is held out of preset position.

Figure 15 is a View, generally similar to Figures 11 and 13, taken substantially on line l|5 of Figure 16, but illustrating the latch unlatched, the detent member in its locking position, and the lock member in preset position;

Figure 16 is a vertical cross-sectional 'ViEW taken substantially on line l6|6 of Figure Figure 1'? is a view, generally similar to Figures 11, 13 and 15, illustrating the manner in which the latch member may override its normal full latched position without interfering with the locking mechanism, the lock member also bein of a modified type whereby release of the look by actuation of the inside remote control means is impossible;

Figure 18 is a vertical cross-sectional view taken substantially on line l8l8 of Figure 17, and illustrating how the remote control means in this embodiment is ineffective to unlock the lock mechanism.

As the present invention is illustrated as in corporated in latch mechanisms of the types described and claimed in said Edwin L. Allen United States Patent applications Serial Nos. 75,623 and 131,296, and as the present invention is of the general type described and claimed in said Angelo R. de Vito application Serial No. 89,540, cross reference is hereby made to said copending applications in which certain subject matter is claimed which is illustrated and described but not claimed herein.

Referring now to the drawings, a fragmentary portion of what may be considered to be the lefthand front door of an automobile is indicated at C. The body pillar P carries a keeper member (not shown) which coacts with the latch mecha nism mounted within the door C. Handle i is fixed to the door and houses at one end an outside operating member which, as illustrated, takes the form of a push button 2 suitably sup ported in a tubular guide 3 and provided with an operating plunger 4. The spring 5 holds push button 2 in its normal non-operating position, seen in Figure 2, except when pressure is exerted by the operator.

It will be understood that although I have illustrated the outside operating means for the door control mechanism as a push button, a suitable lever, pull handle, turn handle, or other device might be employed to effect outside operation of the door control mechanism and accordingly the push button 2 is to be considered as being merely illustrative of one form of outside operating means.

The push button guide or housing 3 is suitably mounted on and extends through the outside panel 6 of door 0. The inner door panel and a door free edge wall 8 enclose the latch mechanism in usual manner. In Figure 2 the window glass is seen at 9 suitably supported in a glassrun channel l0 and the inside garnish molding indicated at H.

As is clearly seen in Figures 2 and 4 my latch mechanism includes a frame structure having a base plate portion 2 and a side flange portion i3. Supporting screws extend through the free edge wall 8 into the threaded holes, it (Figure 2) to secure the latch frame structure firmly in position on the door. A bifurcated latch member L is secured on a latch shaft 15, the flattened end. of which is seen in Figure 2, which is rotatably supported by a suitable bearing (not shown) carried by base plate I 2. Shaft I5 extends through an aperture (also not shown) in the edge wall 8 of the door and the latch member L is mounted at its outer end on the outer side of edge wall 8 in position to coact with a keeper pin shown) mounted on the adjacent door frame in a well known manner and as is fully described in the Rudolph I. Schonitzer Patent No. 2,094,413 and in the Edwin L. Allen copending United States patent application Serial No. 746.521. Mounted on the shaft [5 adjacent the inner sur--- face of base plate I 2 is a latch plate member generally indicated at M. The spiral latch spring [6 has its inner end secured to the inner end ofshaft l5 and its outer end anchored to the side flange 13 of the latch frame.

In common with the latches of the above-referred to Schonitzer Patent No. 2,094,413 and Allen application Serial No. 746,521, latch spring 15 at all times urges the latch member L in unlatching direction (clockwise as seen in Figure 2) and, as latch plate M is mounted on shaft l5 for movement with latch member L, it will have corresponding rotary movement. A cover plate or disc ll for the spring [6 is also mounted on the end of shaft 15 and is shown partially broken away in Figure 2 to permit a direct view of the main latching tooth l8 and secondary latching tooth if) of the latch plate M. Circumferentially spaced from secondary tooth IS on the latch plate M is an unlatching stop lug 29, the function of which will be later described.

As seen in Figure 2, the parts are in door latched and door locked positions. The latch member L has its depending bifurcated legs in position to encompass the keeper pin (not shown) and hold the door in closed position. In order to maintain the latch member L in the full latched position of Figure 2 a detent member, generally indicated at D, is provided. A pin 21 carried by base plate l2 forms a pivotal support for detent D and the downwardly projecting arm portion 22 of detent D has formed thereon a latch holding portion or pawl 23. To constantly urge detent member D in latch holding direction (clockwise as seen in Figure 2) a spring 25 is provided which is supported and held in position by an enlarged head on pivot pin 2! and which has its end 24' fixed by bearing against the outer convolution of spring l6 and its free end portion 24 engaging the offset portion 25 of the transversely extending arm 26 of detent member D to urge same in latch holding (clockwise in Figure 2) direction.

Figure 5 illustrates the unlatched position of latch member L and it will be understood that, when the door is closed, latch member L engages the keeper on the door frame and moves in counterclockwise direction into the latched position of Figure 2. As spring 24 urges detent D in latch holding direction the latch holding pawl 23 of detent D will, during closing of the door, first drop into the notch l9 behind the secondary latching tooth l9 and then, as the door reaches full latched position, drop down into latch holding position as seen in Figure 2 in engagement with main latching tooth IB. To release the latch mechanism the detent D is actuated, in a manner to be later described, to move the lower arm portion 22 thereof in counterclockwise direction (Figure 2) until the pawl (not 23 clears the outer end of tooth [8. This will permit the latch member L to rotate in clockwise or unlatching direction until it reaches the unlatched position of Figure 5 in which the unlatching stop lug 20 on latch plate M is in engagement with a corresponding stop lug 2'! on detent D. Movement of detent D in latch holding direction is limited by engagement of a projection 28 on the end of lower arm 22 of detent D with the outer edge face of latch plate M. This engagement prevents the pawl 23 from striking the edge of latch plate M when it snaps into latch holding position under the influence of spring 24. The latch and detent mechanism described above, which as an assembly may be termed a latch unit, is fully described and claimed in the copending United States patent application of Edwin L. Allen, Serial No. 131,296, filed December 6, 1949, and cross reference is hereby made thereto.

The detent D, generally speaking, lies substantially in the plane of the latch plate M and in close proximity to the base plate I2. However, an offset portion 25 of transverse arm 2% extends inwardly and the end portion 26 is disposed in generally parallel, but substantially spaced, relation to the base plate ill to accommodate the locking mechanism as will be later described. Detent member D also includes an upwardly extending arm portion 29 and the inwardly projecting flange 36 extends from the upper end of arm 29 to the lower portion of arm 22. This flange serves to stiffen the detent structure and also provides an abutment against which the push button plunger t engages when push button 2 is moved to operate the latch mechanism. The general form and arrangement of detent, latch member, and latch plate so far described in this specification is substantially like that described and claimed in the said copending patent application of Edwin L. Allen, Serial No. 131,296, filed December 6, 1949, and accordingly no claim is made herein to certain features claimed in said copending application.

The end 26' of transverse detent arm 26 acts as a lock hold-out portion as will appear later and it extends through and is guided by an elongated slot 3! in the side flange i3 (see Figures 2, 4, etc.). As the detent member D is moved between its latch holding position seen in Figure 2 and its latch released and locking positions, seen in Figures 5 and '7, respectively, the end 26' moves in the slot 3i.

In order to lock the detent D in latch holding position (Figure 2), and thus prevent unlatching and opening of the door C, a lock member, generally indicated at B, is pivotally mounted on the side flange l3 by a suitable pin 32. The upwardly extending portion 33 of lock member B has a detent restraining projection 3 1 which, when the lock member B is in locked position as seen in Figures 3 and 4, is disposed across the slot 3! below the lower edge of end 26' of detent arm 26. It will be observed that when in this position the detent D cannot be moved in unlatching direction sufficiently to permit pawl 23 to clear tooth it to release the latch member L for door opening movement.

When the detent member D is in latch holding position (Figures 2, 3 and 4) the lock member B may be moved at will into and out of locked position. The unlocked position of lock member B is clearly seen in Figure 6. This locking and unlocking movement may be effected by the inside lock knob 35 mounted on the operating rod 36, which is secured at its lower end to the lower portion 3'! of lock member B, or by the outside key operated mechanism to be later described. Rod 36 extends up through the garnish molding H of the door in well known manner. When knob 35 is in its lower position, seen in full lines in Figure 2, the lock member B is in locked position and when the knob 35 is lifted into its upper position, seen in phantom lines in Figure 2, the accompanying upward movement of rod 36 will move lock member B from the locked position of Figures 2, 3 and 4 into the unlocked position of Figure 6. It will be understood that the knob 35 is illustrative of only one of various inside look operating means which can be used. For example, the lock member B can be connected to be operated from locations other than on the garnish molding or by suitable movement of the usual remote control handle.

A snap-over spring 33 has one end 38 fixed to the side flange [3 of the frame structure and its other movable end 38" connected to the lower portion 3'! of lock member B. As the ends of this spring 38 are constantly urged apart the lock member B will be urged in looking direction (counterclockwise as indicated by the arrow in Figure 4) when in locked position and in unlocking direction (clockwise as seen in Figure 6) when in unlocked position. The action of the spring 38 changes or snaps over when the movable end 38" thereof crosses the common center line drawn between center of the pivot pin 32 and the fixed end 38' of spring 38. As will be again referred to later, this snap-over action occurs at a predetermined point before the outer corner of detent restraining portion 34 of lock member B has reached, when moving in looking direction, its intermediate or preset position seen in Figure 8. Thus, when lock member B is in its intermediate or preset position, the function of which will be later described, spring 38 urges it in locking direction.

In Figure 4 the upper and lower ends of lock member B, and the snap-over spring 33, shown in phantom lines in an intermediate position during movement of lock member B, as by operation of knob 35, from locked to unlocked position. In the phantom positions the corner of detent restraining portion 3d of upper end 33 of lock member B has moved away from locked position sufliciently so that the corresponding clockwise movement of the lower end portion 3! of lock member B has moved the free end 38 of snap-over spring 38 across the common center line of pivot pin 32 and fixed end 38' of spring 33. As seen inv phantom position in Figure 4 spring 38 is urging the lock member B in clockwise or unlocked direction and will continue to move the lock member B until it reaches its final unlocked position as seen in Figure 6. As will be explained later, movement of lock member B from its locked (full line) position of Figure 4 into the intermediate (phantom line) position of Figure 4.- may be effected by the upper end of the remote control bell crank upon opera-- tion thereof to release the latch.

As noted above, and as is evident from Figures 3 and 4, look member B may be moved into and out of locked position at will by means the rod 35 and knob 35 when the detent D is in latch holding position. The same locking and unlocking movement of member B may also be effected, when the detent D is in latch holding position, by means of the outside key actuated mechanism generally indicated at K in Figure 2.

This key controlled lock operating means is substantially identical with that disclosed and claimed in the copending United States patent application of Edwin L, Allen, Serial No. 76,023, filed February 12, 1949, and will be only briefly described here. A cylinder lock 39 of suitable type is adapted to be operated by a key 40 and the connecting shaft 4| operates the rotatable finger 42 (Figure l) which is supported by the side flange l3 and operates within a generally C-shaped recess 43 in the lower portion 3'! of lock member B. As seen in Figures 4 and 6 of the drawings the finger 42 is in a mid or neutral position. Rotation of finger 42 through a predetermined arc in either direction from its midposition may be eiiected by proper turning of the key 40. Cylinder lock 39 is of the type wherein the key cannot be removed except when the lock is in its neutral or mid-position and thus finger 42 must always be returned to mid-position to permit the operator to remove the key. This arrangement permits lock member B to be moved into and out of locked position, when the latch member is held in door fully latched and locked position (Figures 3 and 4) by detent D, either by the inside knob 35 or the outside key mechanism K regardless of the position the lock member B may be in.

In order to stop or block movement of lock member B, when in its unlocked position of Fig-- ure 6, against movement in looking direction sufficient to cause snap-over spring 38 to change its action and urge lock member B in looking direction, I provide an inwardly bent lug or tang portion 33 at the top of the upper end portion 33 of lock member B. A coacting lock stop portion 26" projects from the transversely extending arm 26 of detent D. As seen in Figures 5 and 6 the lock stop portion 26" of detent D is disposed in the path of movement of tang 33, the detent D being in latch released position. The phantom lines on Figure 6 indicate that if an attempt is made to move lock member B in locking direction, when the latch is unlatched and detent D is in latch released position, lock member B can only be moved a short distance until tang 23' engages lock stop member 23" as shown by the phantom lines. As spring 38 in this position is still urging lock member B in unlocking direction it will return lock member B to full unlocked position upon release of pressure on knob 35 or key 40. Thus, when the door is unlatched and open the lock member B cannot be moved into the preset position of Figure 8 by either the knob 35 or the key at The operation of the above described mechanism to chest locking of the door by suitable distinctive manipulation of the outside operating means (push botton 2) will now be described.

Assuming that the door is open and the parts are in their normal unlatched positions of Figures 5 and 6, the push button 2 being in its normal non-operating position as seen in Figure 2, when the operator pushes inwardly suinciently to move push button 2 beyond its normal latch releasing position the detent D will be moved in counterclockwise direction beyond its latch released position of Figures 5 and 6 into its locking position of Figures '7 and 8. During this locking movement of detent D the end portion 26 thereof (the lower edge of which may be referred to as the lock operating portion of the detent) will move downwardly in guide slot 3! until it has direct engagement with the operating edge face 44 of lock member B. As seen in Figure 6,

this edge face 44 extends across slot 3 I, when lock member B is in unlocked position, and is disposed in the path of movement of the lock operating portion of detent D from latch released position (Figure 6) to locking position (Figure 8) The downward movement of the lock operating portion (the bottom edge of end 26 of detent D) from its latch released position seen in Figures 5 and 6 into the locking position seen in Figures 7 and 8 will, through engagement with edge face 44, move lock member B in locking (counterclockwise as seen in Figure 6) direction sufficiently to cause the free end 38" of snap-over spring 38 to cross the common center line between pivot pin 32 and fixed end 38' of spring 38. When this cross-over occurs the action of the spring 38 is reversed and it then urges lock member B in counterclockwise or locking direction and will move it into the preset position seen in Figure 8. When in this preset position lock member B is held against further movement in locking direction by engagement with the side face of the end portion 25' of detent D, which may conveniently be termed the locl: holdout portion of detent D as it serves to hold the lock member out of locked position and maintain it in preset position until the operator closes the door. Upon full closing and latching of the door the detent D will move into its latch holding position seen in Figure 3 in which the lock hold-out portion 25 has been moved upwardly in slot 3| to clear the corner of detent restraining portion 34 of lock member B and permit the lock member to move on into locked position as seen in Figure 4. When this occurs the door is automatically locked and cannot be unlocked from outside except by use of the key 48. Lock member B cannot move beyond the locked position of Figure 4 because of engagement of the upper end 33 thereof with the lock hold-out portion 25' of detent D.

It will be clear from the above description that when the door is open and unlatched the lock member B cannot be preset or locked by means of the inside knob 35 or the outside key 40. However, it can be preset by a suitable distinctive manipulation of the outside operating member (push button 2) from its normal non-operating position beyond its latch releasing position into a locking position in which it moves the detent D into the locking position seen in Figure 7. When the operator releases the outside operating member after this manipulation the lock member B has been moved into its preset position of Figure 8 and the detent D will return to its normal latch released position of Figure 5. It should be noted at this point that when the lock member B is unlocked and the detent D is in latch released position the lug or tang 33' on lock member B is disposed between the lock stop member 26" and the base plate I2 (as clearly seen in Figure 6) but that, after the above described lock presetting operation has been completed, the lock stop member 26" of detent D will be disposed between the tang 33' and base plate I2 (see Figure 8). During movement of lock member B from the unlocked position of Figure 6 into the preset position of Figure 8 the lock stop portion 26" of detent D is withdrawn out of the path of movement of tang 33, the clearance between these parts in this situation being indicated at 45 in Figure 7.

When the operator releases the pressure on the outside operating means 2 and then closes the door, the latch mechanism being in the preset position shown in Figure 8, the pawl 23 of detent D will first drop into its secondary latched position in notch IS on latch plate M. If the door is not pushed shut with sufi'icient force for full latching the pawl 23 will stop in notch I9 in engagement with secondary latch tooth i9 and the latch member L, and the door, will be held in secondary latched position. However, such movement of detent D into its secondary latched position will not lift the lock hold-out portion 25 thereof far enough above its normal latch released position, seen in Figures and 6, to permit the detent restraining portion 34 of lock member B to move into locked position beneath end portion 26'. become automatically locked in secondary latched position. Of course, as described above. when the door reaches full latched position of Figure 3, the end portion 26' will move up to the latched position of Figures 3 and 4, above the detent restraining portion 34 of lock member B, permitting the snap-over spring 33 to move the lock member B into locked position (Figure 4). In the copending United States patent application of Edwin L. Allen, Serial No. 769,688, filed August so, 1947, now Patent No. 2,480,688, there is described and claimed an automatic lock mechanism by which automatic locking may be effected upon closing the door and cross reference is accordingly made thereto.

Figures 4 and 6 illustrate how the latch spring I6 extends through a rectangular hole '35 in look member B to permit the necessary movement of the lock member without interference from spring Hi.

In addition to means for operating the latch mechanism from outside the door it is of course necessary to provide mechanism for releasing the latch from inside the door. Referring to Figures 4, 6 and 8, the inside operating means includes a bell crank member R pivotally supported on a pin 41 carried by the side flange I3. The lower arm portion 43 of bell crank R carries a headed pin 49 by which an inside remote control operating strap or the like (not shown) is operatively connected to the bell crank. The upper arm 50 of bell crank R has a camming end face 5! which, under conditions to be later described, will engage the inclined edge surface 52 of the end of upper portion 33 of lock member B. The bell crank spring 53 is positioned by the pivot pin All and has a fixed end 53 held by a lug 54 on side flange 13 and a free end 53" engaging the lower arm 48 of bell crank R. Spring 53 always urges the bell crank toward its normal nonoperating position in counterclockwise direction as seen in Figure 4. Movement of bell crank R beyond this normal non-operating position is prevented by engagement of an oifset 55 on the lower :arm 48 with the edge of side flange l3.

When the bell crank R is rotated in latch releasing (clockwise as seen in Figure 4) direction,

as by a pull exerted on a remote control strap connected to pin 49 through a handle or the like mounted on the inner door panel, the bell crank R may be moved until the shoulder 56 on the hub portion of bell crank R engages the lower end of fixed lug 54. Assuming that the lock member B is in locked position, as seen in Figure 4, when the remote control mechanism is operated, the first movement of bell crank R in clockwise direction will cause the carnming face 5! to strike the inclined face 52 on lock member B, pushing it in unlocking direction. By the time the upper end 50 of bell crank R reaches the phantom line posi- Thus the mechanism will not 10 tion of Figure 4 the free end 38" of snap over spring 38 will have been moved across the common center line between pin 32 and fixed end 38' of spring 38, and the action of snap-over spring 38 will have been reversed as is seen from the phantom line position thereof in Figure 4. As the bell crank R continues its movement in clockwise direction it will engage end portion 25 of detent D and push it downwardly into the latch released position. This of course will permit opening of the door and the snap-over spring 38 Will move the lock member B back to its unlocked position of Figure 6. As seen in Figure 3, this unlocking operation by means of the remote control mechanism may be effected without interference between the coacting lug 33 on lock member B and lock stop portion 26" of detent D as these coacting portions are positioned, when the detent is in latch holding position, to permit movement of lock member B without interference by the lock stop portion 26".

As noted above, movement of bell crank R in latch releasing direction is limited by engagement of shoulder 56 with the lower end of lug 54 and this occurs before end portion 26 of detent D moves the lock member B, through engagement with the operating edge face 45 thereof, sufficiently to cause the snap-over spring 38 to change its action and move the lock member B into preset position. Thus the inside remote control mechanism, including bell crank R, cannot be used to preset the lock.

From the above it will be seen that if the door is closed, latched, and locked, and the inside remote control means is operated the latch mechanism will first automatically be unlocked and then unlatched. However, the inside remote control mechanism cannot be operated to effect presetting of the lock mechanism for automatic looking upon closing the door. As explained previously, if the door is open and the latch parts are in unlatohed position, pushing down on the inside knob 35 will not effect presetting of the lock mechanism because the lock stop member 26 will block the coacting lug 33' on lock member B and prevent its being moved to the snap-over position of spring 38. If an attempt is made to preset the look by means of the knob 35 when the door is open the lock member B may be moved only as far as the phantom line position indicated in Figure 6 and, upon release of the knob, will be moved back to full unlocked position by the spring 38.

As in mechanism of said copending Angelo R. de Vito U. S. patent application, Serial No. 89,540, filed April 25, 1949, to which cross reference has previously been made, the operator can only preset the mechanism for automatic locking upon closing the door by moving the outside operating means (push button 2) from its normal non-operating position beyond its unlatching position into its locking position, and then releasing the outside operating means and closing the door. This distinctive operation substantially eliminates the possibility of the operator locking the door with the key inside the car. However, if the operator has fully closed the door but has not preset the lock he can still look it by means of the key. Furthermore, as explained above, with my improved mechanism, as in the apparatus of said de Vito copending application, the door cannot accidentally become locked in its secondary latched position if the operator fails to swing the door with suilicient force to reach full latched position.

In some cases, particularly for rear doors of 11 four-decre d vehicles, it" is deemed desirable to have'theremote"control mechanism so arranged that unlatchiiig movement "thereof will no't'efiecfiufilockingofthe door provided it'has'iore- Yiously been locked. This may readily be accomplislied by-cutting'back the top end of upper portidniatj offlockmernb er B' toremove the inclined edge si1rface'52 thereof so that the endf ace 5! of hell ram; R will not'engag'e the lock member as it oves from the full line position into the phantoni'lin'e p ositionof Figure e. r ""Fig'ur'es9fand 1o illustrate a modification of my i rbyeulatch mechanism whereby a dual operatioi'i'is neeejssaryoh' th'epart or" the operator to prese 'thej'm'echanisin for automaticlocking upon closing the door. The only structural difference pewter; the apparatus of Figures!) and and that previously described is that in Eig'ur'esQ and 1f); the bpe ratingedge face 11 4 of lock member B is omitted and the corresponding portion 57 of 1001: member 13' (Figure 10) is"cut tacked that when the detent D is moved into locking position (as SEen'ihFiguresQ'and 10 by the outside actuat- {he means, the endportiondfi" thereof W111 not opratively engage the lock member B and conseguntly'will not move it into preset position. With this arrangement, when the door is open and unlatched; it is necessary for the operator first to move the outside operating means into its locking position, with consequent movement of the 'detent D into the position shown in Figures 9 and 10. This movement of 'detent D lowers the loo}; stop portion 25" thereof to a point below the path of movement of the lug 33 on lock member Bias is clearly seen in Figure 9. While holding the detent D in the position seen in Figures 9 and lq by "pressure on the "outside operating means, the operator then, with his other hand, pushes down on the inside operating knob 35 and moves the'lockmember B beyond the snap-over point of spring 36 into preset position as seen in phantom lines in Figure 10. After performing this ciiial operation and releasing the inside look knob and, the outside operating member the operator their} shuts the door'and it becomes automatically libelg'e'd in'th mannerp reviously described. Thus, byfa singlevery small change in the mechanism of Fligu'r'es 1' to 3 inclusive, which change adds nothing tothe cost of the mechanism, a latch iiiec pa'hism is provided wherein a dual and concurrent distinctive manipulation of both the outsidev operating means and the inside lock oper'ating memberis required topreset the lock for aute'maticlocking This further guaranteeagainst 196k g'the door with the key inside may beconsfider'ed desirable in' some instances.

ln Fi'guresl l to 13,, inclusive, I have illustrated my" invention as incorporated in a'latch mechanismf'of a somewhat different type than that shown in F igures 1v to 10, inclusive. The general arrangement of the latch mechanism shown in Figures 1i to 18 inclusive, except for the lock op er tihg fapparatu i is generally like that fully descjribed and claimed in the Edwin L. Allen United 'sltatesipatent application, Serial No. 76,023, filed Eeb r'u'ary' m, 1943, to which cross reference has DTCYiOliSIY been made. The frame structure includesa hase'plate 58 and a side flange member 53, Latch member L is supported on a shaft 69 which also carries the latch plate member 6!. Thelatchspring, which is broken away for clear- .nessj of illustration is seen at 82,.and urges the shaft 80, latch member L, and latch plate 6| in unlatching (clockwise as seen in Figure 11) direction? v In order to hold the'latch in latched po ition a'detent member; 13'' is pivotally'inounted on a suitable p'in"$3'cairied by base pla't 'SB. Detent member D" includesa downwardly ex tending arm portion 64 and a transversely iit ending arm portion 65. The inwardly" projecting flange 66 is engaged at its lower end by suitable outsideoperatingmeans, such as a push button of the type illustrated in Figure 2, and also"a'cts as ch abutment for the lower end 61"o'f"detent spring '61. The upper 'end 6'1""of spring'fi'l is anchored in a hol"68 in side flange'SQ'and' the spring 61 urges detentD" in latch holding direction (counterclockwise as seen'in Figur 'ilif When in'lat'che'd position (Figures '11 and 12) the latch holdingportion 6 9 of detent D "'is "di'siposed in abutting latch holding engagement with the main or full latched stop portion 10 oflatc'h plate 61. To'release the latch end permit'opie'ning of the doorjdtent D" is moved in latch releasing direction (clockwise as seen in Figure 11) to lift the'transiverse a'r'm65 sumeienuy to'move latch holdingportion 69 out of engagement with the stop portion 'iflj'of latch plate 61*." This Del?- mits the latch 'platet l and latch member L" to rotate in unlatchi'ng direction "(clockwise as 'seen in Figure 11) ihto'unl atched positi'on'as' seen in Figure 13 with'th'e stop men of lrtch'pla't'bfl abutting theda't ch holdingportion (3 9 of deterit 1 and blocked against fui'ther'm'ovement injunlatching direction "thereby. A secondary latch stop portion 12'is preferably also provided on the lat'ch' plate BJL A This particular arrangement of latch plate anddetent is advantr geous in installations where it is desired t'o' ha've the 'out'sideoperating push button or handle" disposed substantially atth'e horizontal levelof latch member L while the embodiment illustrated in Figures 1 to 10 is particularlyu'seful installations where theoutside operating me'rnloerislto be positioned substantially out of 'hrizorital alignment with the'l'iftch memher. "The transverse'arm 65 of 'detent D"ha"s an offset portion is, generall similar to offset pertio'n'25oi Figures ito '10, and an outer endportion 'ldwhich extends through an isjf ujided'by a slot 1 5 in the side fla nge 59' of theframe'structure; End portior'i Hi serves toblochthlock member 'BV'i'n preset position and alsois effective to move theflock member B' in'the presetting thereof as willflater appear] In Figures li to 16 the lock member B is pivqt'ally supported by a pin 6 carried'fbyside flan .8.. id. ha an up ly t ndin a m p r df a we 'iw tion Al o e h ulde and. p r dets f e t a ni hgu gr fl. are a me 1 he p mr t d T of 9 k e he arid; W enth art a n latched and lgelg'ed positions as, sen, in Figures 11 12, the uter end portion [4 "of detent. D is, i osed be ween. sndfshoumers in. and 9- Projecting inwardly fromai t forming, part, of d fi nt g fitrainih j i ti. f u rf an's 8| and p o ti utward y from; th foff et. por 13; of V detentpf is'a lock istop portion 82, Aswill appear later thelseparts, 811 and 8? coac t. in a man er nera lyf imilario he parts; 2 1' a d 1 of; the mechanism shown in Figures, 11 to. lg to o r l h onera o lof;the qckmemb B. n emannr de i e An nturne g n ral y Q-sha edfianee 3 se Figure iz) is also'formedon the. upwardly e};- en in arm oc m be Bi des tween th Q seip ni n r em 'Ja'n h side flange 59." -A l'ock' operating tongue portion 13 84 projects from transverse arm 65 of detent D below the offset portion 13 and toward the side flange d of the frame and, as will appear later is adapted directly to engage the C-shaped flange 83 of lock member B to effect presetting thereof. In order to give the desired action to lock member B" a snap-over spring 85 has one end 85 anchored to the side flange 59 and the other movable end 835" connected to the lower portion '58 of lock member B". When in latched and locked position, seen in Figures 11 and 12, spring 35 urges lock member 13 in looking direction (counterclockwise in Figure 12) and holds it in locked position. When lock member B is in un locked position, as seen in Figure 14, spring 85 urges lock member B in unlocking direction (clockwise as seen in Figure 14) and holds it in unlocked position. When detent D is in latch holding position (Figures 11 and 12) lock member B may be moved at will from the locked position of Figure 12 into the unlocked position of Figure 14 and return by means of the operatin rod 35 which is connected to an inside lock operating member such as the knob 35 shown in Figure 2. It may also, when the detent is in latch holding position, be moved into and out of locked position by means of the finger 8'! which is connected to be actuated by a key controlled cylinder lock in the manner shown in Figure 2 and explained in connection with the embodiment of Figures 1 to 8. As the lock member B" is moved from the unlocked position of Figure 14 toward the locked position of Figure 12 the free end 85 or spring 85 approaches the common center line between pivot pin it and fixed end 35' of spring 85. The parts are so arranged that free end 85" of spring 85 will not cross this common center line, and thus reverse the action of snap-over spring 8%, until after the lug 8! on lock member 13 has moved in looking direction to a point beyond that indicated in phantom lines in Figure 14, but at a point prior to reaching its preset position as seen in Figure 16 with lug 8| engaging end portion ll! of detent D.

The operation of the mechanism shown in Figures 11 to 16 to effect automatic locking of the door by a suitable distinctive manipulation of the outside operating means (such as push button 2) will now be described. Assuming that the door is unlatched and the detent D and latch plate iii are in the positions shown in Figures 13 and 14, the operator, if he desires to preset the mechanism for automatic locking upon closing the door, will actuate the outside operating member (push button or the like) to move the detent D from the position of Figure 13 into the presetting position seen in Figures 15 and 16. The presetting movement of detent D is limited by engagement of the edge face 88 thereof with the edge of latch plate {31 and it will be observed that when in this position (Figure 15) the latch holding portion 69 of detent D is still in engagement with the stop lug i! on latch plate 6!. As the transverse arm t5 of detent D moves upwardly during this presetting operation of the detent the look stop portion 82 moves upwardly out of its locking member blocking position seen in Figure 14 so that the lug or tang 8! on looking member B may move from the unlocked position of Figure 14 into the preset position of Figure 16 in which it is in engagement with the side face of outer end portion i i of detent D. This movement of locking member 13" from unlocked to preset position is caused by engagement of the lock actuating tongue 84 of detent D with the G- shaped flange 63 on looking member 13 The shape of flange 83 is such that as tongue 84 moves upwardly from the position of Figure 14 into that of Figure 16 it engages flange 83 and cams the locking member B" in counterclockwise direction (as seen in Figure 14) until the snap-over spring 85 reverses its effect and urges locking member B in counterclockwise direction into preset position seen in Figure 16.

After the operator has eilected presetting of the lock member B" as described above, be releases the outside operating member which permits detent D to return to its normal latch released position seen in Figure 13. However, the tang ti on looking member B" is still in contact with the side face of end portion 14 of detent D and thus is still held in preset position. When the operator'now closes the door with sufficientforce to move it into full latched position the latch plate 6! and detent D assume their latched positions seen in Figure 11. When this occurs the end portion M of detent D' is moved out of. locking relation to the tang 6| on locking menu-- b er B" thus permitting the snap-over spring 85' to move locking member B" on into locked posi-- tion as seen in Figure 12. Thus the door will be automatically looked upon full closing thereof. However, i;" the door should inadvertently stop in its secondary latched position the locking member B" would not move into locked position as it would still be blocked in preset position by the end portion it of detent D.

Figures 13 and 14 also illustrate how the looking member B" is prevented from movement into preset position, when the door is unlatched by means of the operating rod 36 or the keyactuated finger c1. If a downward force is exerted on rod 86 when looking member B" is unlocked as seen in Figure 14, it can only move in counterclockwise direction until the tang 81 engages the lock stop portion 82 on detent D. This engagement is indicated in phantom lines in Figure 14 it has been explained above that such movement of lock member 13 is not suflicient to cause reversal of the action of spring 85 and accordingly, upon release of downward pressure on rod 86, the locking member B" will be returned to unlocked position (full lines in Figure 14) by spring 85. A remote control lever 89 is pivotally mounted at 99 on the side flange 59 of the latch frame structure. Spring ii! has its fixed end anchored against a flange 92 on frame side Wall 59 and its free end engaging a flange 93 bent inwardly from remote control lever 89. Thus spring tends to hold remote control lever 85-! in idle or non-operating position as seen in Figure 12 with the upper end portion 94 thereof in engagement with the edge portion 95 of side flange 53. A suitable operating strap or bar (not shown) is connected to the pin 36 on remote control lever 89 and a handle or other means are provided for exerting a pull on this link or strap when it is desired to release the latch from inside of the door.

Movement of remote control lever 89 in latch releasing direction is limited by a stop lug 9'! which, as seen in phantom lines in Figure 14, is adapted to strike the flange 92 and prevent its further movement. As illustrated the maximum latch releasing movement of remote control lever as will serve to move detent D sufiiciently to release the latch but will not move the detent D into lock presetting position. Thus the lock mechanism as shown in Figures 11 to 18 cannot be; preset by the: inside. remote control apparatus,

In the apparatus of Figures 11 to, 16: the lock member B and remote control lever 89 are soarranged that operation of: the remote control lever will, if the latch. mechanism is; locked, first unlo k sam and t n. e ec unla h ne h me? to permit openingof the door. This arrangement is described and claimed inthe copending patent application of Edwin L. Allen, Serial No. 76,023, and it need only be pointed outhere that the described action is effectedby: providing. a projection 98 onthe locking; member B" which, when the locking member is; looked asseen in Figure 12, is disposedin the path of the operat ing finger portion 99 of remotegcontroL lever 89. 'I-huswhen remote-control lever 89 is moved from the position: seen in Figure-l2 in; counterclockwise direction finger 99'Wil1j first engage projection 98 and camthe locking member B out oi locked position (Figure 1-2)- into unlocked position (Fig-- ure l4): Finger 99 thenengages the underside of end p )rtion H ofid'etent D, lifting it sufficiently tocause release Off the=1atch.- Iithis automatic unlocking action by the remote control mechanism is notdesired it"is-onlynecessary toomit the. projection 98 as'seenvin-Figure 18 in which case-,,if the. door is. locked; itcannot be unlocked by operationofthe remote controldevice;

Figure-1'7: illustrates the latchmember L and latch plate 61; as: rotated. beyond their normal latchedpositions. This would occur only under unusual circumstances such as an attempt to shut the door with: the: latch member in latched positionor when the: 1 at ch member overridesits normal latched-position: due to; wear or absence of theiweather seal.- Figures 17,- and 18; show the parts of thermechanism in the same positions andrillustrateithat the overridingfeature, which is very desirable'in alatchmechanism of this type-to. prevent: damage. to-the parts, is not'in any wayn r e ed i b m c mpr vedrrs tins. and sel o n me i m...

Although the illustrated embodiments? of my invention have-been'described in considerable de tailv it. will be understood that variations and modifioationsmay-be-made. in the form and-arrangement; of the parts thereofl It has been demonstrated that my; invention may be applied to two different types of door control-units, i. e.-,

that shown inEiguresyl to -10, inclusive; and th at shown inaliigures ll.to-18, inclusive.- Accords. ingly; I do: notwish to be .limiteditoithe.particular structuresandarrangements of.- parts herein shownv anddescribed, .but claim asmy invention all embodiments thereof coming withinithe scope of the appended claims..-

I claim;

1. Door. control mechanism including a-movable latch member supported: for movementbetween full latched, secondary latched, and unlatched positions,-aidetentimember supported for movement between latch holding; latch released, and lockingpositions, a" lock member supported for; movement .between 1ocked,, preset, and 1m:- locked positions, said lock member, when in locked position, being; disposed to block said; detent memben against movement from latch holding, into. latch released-position, saidilock. member also. having an operating portion-which; when said;lock;.member is-.-in.unlocked position, is dis-- poseds in. the path of: movement. of said. detent member-between saidlatch. released position-and. said. locking, position, the direction:- and extent of .said @path of movement of: said detentimember' member from latch released position to locking position there will be direct engagement between said detent member and said operating portion of said lock member whereby said lock member will be moved from its unlocked position into its preset position, lock hold-out means, effective only when said latch member is out of said full latched position, for holding said lock member at said preset position, lock stop means effective only when said detent member is in said latch released position, for blocking said lock member out of said preset position, and an outside operating member having a portion disposed to actuate said detent member and move same from latch holding position to latch released position and farther to locking position.

2. Door control mechanism including a movable latch member, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between locked and un= locked positions and adapted when in locked positi'cnto prevent unlatching of said latch member, and: means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked position and inloeking direction during a final part of its said movement from unlocked to locked position, lock member hOldr-O'llt means effective when said detent is out of its said latch holding position to block said lock member in said final part of its movement against movement into locked position, lock member stop means for restraining said lock member against movement from said initial part of its movement into said final part of its movement when said detent member is in latch released position whereby said lock member can be moved from said initial into said final part ofits movement onlywhen said detent member is in its latch holding position or its locking position, andinsioeoperating means, independent of said detent member, for moving said lock member between said locked and unlocked positions when said-detentmember is in said latch holding position'.

3. Door control mechanism including a movable latchmember supported for movement between latched. and unla'tched position, a detent membersupported for movement between latch I holding, latch released, and locking positions, a.

lock member supported for movement between latch lo'cked', latch unlocked, and lock preset po-' sitions and adapted when in locked position to prevent movement of. said latch member from I saidlatched to said unlatched position, said detent member having a lock member stop portion: disposed in the path of said lock member and aoapted to prev-entmovement of said lock memberfrom unlocked position into preset position when saiddetent member is in said latch released position and disposed out of said. pathto permit movement of said lockmember from unlocked position into preset position when said: detent member is in said latch holding position or said locking position; manually operable means for m'oving'said detent member'between its said latchholding,.latch released, and lookmg positions, and means for. moving. said lock member between itssaidunlocked, preset, and locked positions.

daDoor. control mechanism including a movable. latch' member supported for movement between, latched and unlatchedposition, a detent member supported for movement bebeinsssuchithat durincemovementofsaid-detent: 7e w en lat h holdin latch relea ed: and-10cm;

17 positions, a lock member supported for movement between latch locked, latch unlocked, and lock preset positions and adapted when in locked position to prevent movement of said latch member from said latched to unlatched position, said detent member having a lock member stop portion disposed in the path of said lock member and adapted to prevent movement of said lock member from unlocked position into preset position when said detent member is in said latch released position and disposed out of said path to permit movement of said lock member from unlocked position into preset position when said detent member is in said latch holding position or said locking position, said detent also having a lock hold-out portion positioned in the part of said lock member and blocking said lock member against movement from said preset position into said locked position except when said detent is substantially in said latch holding position, manually operable means for moving said detent member between its said latch holding, latch released, and locking positions, and means for moving said lock member between its said unlocked, preset, and locked positions.

5. Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked and latch unlocked positions, said lock member, when in latch locked position, having engagement with said detent member to prevent movement thereof from latch holding into latch released position, said detent member having a lock member operating portion, said lock member having a coacting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said lock member operating portion during movement of said detent member from said latch released position to said locking position, and means operable from outside the door with which said mechanism is associated for moving said detent from said latch holding position to said latch released position and farther to said locking position, said lock member operating portion of said detent member directly engaging said coacting operating portion of said lock member during movement of said detent member from latch released toward latch locking position, provided said lock member is in unlocked position, whereby said lock member will be moved by said detent member from unlocked position toward locked position.

6. Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked, latch unlocked and lock preset positions, said lock member, when in said latch locked position, having engagement with said detent member to prevent movement thereof into said latch released position, said detent member hav-' ing a lock member operating portion, said lock member having a coacting operating portion disposed, when said lock member is in said unlocked position, in the path of movement of said lock member operating portion during movement of said detent member from said latch released position to said locking position, manually operable means for moving said detent member from said latch holding position to said latch released position and farther to said locking position, means on said detent member for blocking said lock member against movement in looking direction beyond said lock preset position, said lock member operating portion of said detent member having direct engagement with said coacting operating portion of said lock member during movement of said detent member from latch released toward latch locking position, provided said lock member is in said unlocked position, whereby said lock member will be moved by said detent member from unlocked position into lock preset position, and spring means for urging said lock member toward said latch locked position when in said lock preset position.

7. Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked, latch unlocked, and lock preset positions and adapted when in locked position to prevent movement of said latch member from said latched to said unlatched position, said detent member and said lock member having coacting portions disposed to engage each other, provided said lock member is in said unlocked position, upon movement of said detent member from said latch released position toward said locking position whereby said lock member will be moved by said detent member into said lock preset position, manually operable means for moving said detent member from said latch holding position to said latch released position and farther to said looking position, means on said detent member, effective only when said detent member is out of said latch holding position, for blocking said lock member against movement from said preset position to said latch locked position, said detent member having a lock stop portion disposed in the path of said lock member when said lock member is in unlocked position and said detent member is in said latch released position and adapted to prevent movement of said lock mem her from latch unlocked position into lock preset position, said lock stop portion being disposed out of said path of said lock member when said detent member is in said latch holding position or said locking position, and spring means for urging said lock member toward said latch locked position when in said lock preset position.

8. Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked and latch unlocked positions, said lock member, when in latch locked position, having engagement with said detent member to prevent movement thereof from latch holding into latch released position, and spring means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked positionand in looking direction during a final part .of its said movement from unlocked to locked position, said detent member having a lock operatin portion, said lock member having a coacting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said lock member operating portion during at least a part of the movement of said detent member from latch released position to locking position, said lock member operatin portion of said detent member directly engaging said .coacting operating portion of saidlook membertduring movement of said detent member from latch released toward latch locking position, provided said look member is in unlocked position, whereby said lock member will be moved bysaid detent member into said final part of its movement from unlocked to locked position.

9, Door control mechanism including .a latch member supported for movement between latched and unlatched positions, .a detent member supported for movement between latch holding, latch released, andlocking positions, a .lock member supported for movement between latch locked and latch unlocked positions, said lock member, when in latch locked position, having engagement with said detent member to prevent movement thereof ,from latch holding .into latch released position, and spring means for urgingisaid lock member in unlocking direction during an initial part of its movement .irom unlocked to locked position and in looking direction during a final part of its said movement from unlocked to locked position, said detent member having .a lock operating portion, said lock member having a coacting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said lock member operating portion during at least a part of the movement of said detent member from latch released position to locking position, said lock member operating portion of said detent member directly engaging said coasting operating portion of said lock member during movement of said detent member from latch released toward latch locking position, provided said lock member is in unlocked position, whereby said lock member will be moved by said detent member into said final part of its movement from unlocked to locked position, and lock member hold-out means, effective only when said detent member is out of its said latch holding position, for blocking said lock member out of locked position in said final part of its movement from unlocked to locked position.

10. Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked and latch unlocked "positions, said lock member, when in latch locked position, havingengagement with said detent member to prevent movement thereof from latch holding into latch released position, and spring 'means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked position and in looking direction during a final part of its said movement from unlocked to locked position, said detent member having a lock operating portion, said lock member having a coacting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said look member operating portion during at least a part of the movement or said detent member from latch released position to locking position, said lock member operating portion of said detent member directly engaging said coacting operating portion of said lock memher during movementof said detent member from latch released toward latch locking position, provided said look member is in unlocked position, whereby said lock member will be moved by said detent member into said final part of its move- .ment from unlocked to locked position, said detent member also having a lock hold-out portion disposed in the path of movement of said lock member from unlocked toward locked position except when said detent member is in latch holding position, said lock hold-out portion of said detent member being adapted, when said detent member is out of its said latch holding position, to block said lock member out of locked position in said final part of its movement from unlocked to locked position.

11, Door control mechanism including a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported ior movement between latch locked and latch unlocked positions, aid .lock member, when in latch locked position, having engagement with said detent member to prevent movement thereof from jlatch .holding into latch released position, and spring means for .urgingsaid lock member in unlocking direction during an initial part of its movement from unlocked to locked position and in looking direction during a final part of its said movement from unlocked to locked position, said detent member having a lock operating portion, said lock member having a coasting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said lock member operating portion during at least a part of the movement of said detent member from latch released position to locking position, said lock member operating portion of said detent member directly engaging said coacting operating portion of said lock member during movement of said detent member from latch released toward latch looking position, provided said lock member is in unlocked position, whereby said lock member will be moved by said detent member into said final part of its movement from unlocked to locked position, lock member hold-out means, effective only when said detent ,member is out of its said latch holding position, for blocking said lock member out of locked position in said final part of its movement from unlocked to locked position, and lock memberstopmeans, effective only when said detent member is in said latch released position, for restraining said lock member against movement from said initial part of its movement into said final part of its movement.

12. Door control mechanism including .a latch member supported for movement between latched and unlatched positions, a detent member supported for movement between latch holding, latch released, and locking positions, a lock member supported for movement between latch locked and latch unlocked positions, said lock member, when in latch locked position, having engagement with said detent member to prevent move ment thereof from latch holding into latch released position, and spring means for urging said lock member in unlocking direction during an initial part of its movement from unlocked to locked position and in looking direction during a final part of its said movement from unlocked to locked position, said detent member having a lock operating portion, said lock member having acoacting operating portion disposed, when said lock member is in unlocked position, in the path of movement of said lock member operating portion during at least apart .of the movement oi said detent member from latch released position to locking position, said lock member operating portion of said detent member directly engaging said coacting operating portion of said 6 member during movement of said detent member from latch released toward latch locking position, provided said lock member is in unlocked position, whereby said lock member will be moved by said detent member into said final part of its movement from unlocked to locked position, said detent member also having a lock member hold-out portion disposed in the path of movement of said lock member from unlocked toward locked position except when said detent member is in latch holding position, said lock member hold-out portion of said detent member being adapted, when said detent member is out of its said latch holding position, to block said lock member out of locked position in said final part of its movement from unlocked to locked position, and a lock member stop portion on said detent member disposed, when said detent member is in said latch released position and said lock member is in unlocked position, in the path of movement of said lock member from said initial part of its movement into said final part of its movement.

13. Door control mechanism including, a latch member supported for movement between door latched and door unlatched positions, a detent member having a latch holding portion and a lock operating portion and supported for movement between latch holding, latch released, and lock presetting positions, said latch holding portion, when said detent member is in latch holding position, restraining said latch member from movement in unlatching direction and, when in latch released position permitting movement of said latch member in unlatching direction, a lock member supported for movement between a latch locked position and a latch unlocked position and having an intermediate preset position therebetween, said lock member having a detent restraining portion adapted when in locked position to prevent movement of said detent into latch released position, said lock member also having an operating portion disposed, when said lock member is in said unlocked position, in the path of movement of said lock operating portion of said detent member during movement thereof between said latch released position and said locking position, said detent member having a lock stop portion disposed, provided said detent member is in said latch released position, in the path of movement of said lock member from unlocked to preset position whereby movement of said lock member from said unlocked position into said preset position is prevented, said lock stop portion of said detent member being disposed out of the path of movement of said lock member when said detent member is in said latch holding position or said locking position, said detent member also having a lock hold-out portion disposed in the path of said lock member to engage and block same out of said locked position when said detent member is out of said latch holding position, snap-over spring means for urging said lock member in latch locking direction when said lock member is in engagement with and blocked by said lock hold-out portion of said detent member and for urging said lock member in latch unlocking direction when said lock member is moved in latch unlocking direction a predetermined distance from said engagement with said lock hold-out portion, and means for moving said detent member from latch holding to latch released position and beyond said latch released position into said lock presetting position.

LEONARD J. WAGNER.

References Cited in the file of this patent UNITED STATES PATENTS Number 

